Improve tests
Was working, now something's up.
Add KettleResource, experiment with xml output.

Add a KettleResource to the QueryService to link things up, and work towards
support for xml output using built-in content negotiation with @Produces
Roll LocalFileResultResource into LocalFileResult

Combine the result-specific code with the LocalFileResult code.
Also support full paths to nested files (without having to urlencode slashes).
Add support for specifying the data access id

CDA files can contain multiple "data access" ids - we can now specify which
one we want.
Add documentation for Filesystem and CDA providers
Add basic docs for CVB
Add a FIXME
Fix a typo in the CVB example URLs
Remove the non-working Xml* annotations.
Remove the dummy HDFS resource / provider
Add XML output using built-in type handling